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Diffstat (limited to 'arch/powerpc/kernel/prom_init.c')
-rw-r--r--arch/powerpc/kernel/prom_init.c42
1 files changed, 28 insertions, 14 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index debe9734636..2ad9947bd67 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -145,11 +145,11 @@ typedef u32 cell_t;
extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
#ifdef CONFIG_PPC64
-extern void enter_prom(struct prom_args *args, unsigned long entry);
+extern int enter_prom(struct prom_args *args, unsigned long entry);
#else
-static inline void enter_prom(struct prom_args *args, unsigned long entry)
+static inline int enter_prom(struct prom_args *args, unsigned long entry)
{
- ((void (*)(struct prom_args *))entry)(args);
+ return ((int (*)(struct prom_args *))entry)(args);
}
#endif
@@ -241,7 +241,8 @@ static int __init call_prom(const char *service, int nargs, int nret, ...)
for (i = 0; i < nret; i++)
args.args[nargs+i] = 0;
- enter_prom(&args, RELOC(prom_entry));
+ if (enter_prom(&args, RELOC(prom_entry)) < 0)
+ return PROM_ERROR;
return (nret > 0) ? args.args[nargs] : 0;
}
@@ -265,7 +266,8 @@ static int __init call_prom_ret(const char *service, int nargs, int nret,
for (i = 0; i < nret; i++)
rets[nargs+i] = 0;
- enter_prom(&args, RELOC(prom_entry));
+ if (enter_prom(&args, RELOC(prom_entry)) < 0)
+ return PROM_ERROR;
if (rets != NULL)
for (i = 1; i < nret; ++i)
@@ -670,9 +672,11 @@ static void __init prom_send_capabilities(void)
*/
static unsigned long __init alloc_up(unsigned long size, unsigned long align)
{
- unsigned long base = _ALIGN_UP(RELOC(alloc_bottom), align);
+ unsigned long base = RELOC(alloc_bottom);
unsigned long addr = 0;
+ if (align)
+ base = _ALIGN_UP(base, align);
prom_debug("alloc_up(%x, %x)\n", size, align);
if (RELOC(ram_top) == 0)
prom_panic("alloc_up() called with mem not initialized\n");
@@ -686,7 +690,7 @@ static unsigned long __init alloc_up(unsigned long size, unsigned long align)
base = _ALIGN_UP(base + 0x100000, align)) {
prom_debug(" trying: 0x%x\n\r", base);
addr = (unsigned long)prom_claim(base, size, 0);
- if (addr != PROM_ERROR)
+ if (addr != PROM_ERROR && addr != 0)
break;
addr = 0;
if (align == 0)
@@ -746,7 +750,7 @@ static unsigned long __init alloc_down(unsigned long size, unsigned long align,
base = _ALIGN_DOWN(base - 0x100000, align)) {
prom_debug(" trying: 0x%x\n\r", base);
addr = (unsigned long)prom_claim(base, size, 0);
- if (addr != PROM_ERROR)
+ if (addr != PROM_ERROR && addr != 0)
break;
addr = 0;
}
@@ -852,9 +856,16 @@ static void __init prom_init_mem(void)
type[0] = 0;
prom_getprop(node, "device_type", type, sizeof(type));
+ if (type[0] == 0) {
+ /*
+ * CHRP Longtrail machines have no device_type
+ * on the memory node, so check the name instead...
+ */
+ prom_getprop(node, "name", type, sizeof(type));
+ }
if (strcmp(type, RELOC("memory")))
continue;
-
+
plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
if (plen > sizeof(regbuf)) {
prom_printf("memory node too large for buffer !\n");
@@ -1632,18 +1643,21 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
unsigned long soff;
unsigned char *valp;
static char pname[MAX_PROPERTY_NAME];
- int l;
+ int l, room;
dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
/* get the node's full name */
namep = (char *)*mem_start;
- l = call_prom("package-to-path", 3, 1, node,
- namep, *mem_end - *mem_start);
+ room = *mem_end - *mem_start;
+ if (room > 255)
+ room = 255;
+ l = call_prom("package-to-path", 3, 1, node, namep, room);
if (l >= 0) {
/* Didn't fit? Get more room. */
- if ((l+1) > (*mem_end - *mem_start)) {
- namep = make_room(mem_start, mem_end, l+1, 1);
+ if (l >= room) {
+ if (l >= *mem_end - *mem_start)
+ namep = make_room(mem_start, mem_end, l+1, 1);
call_prom("package-to-path", 3, 1, node, namep, l);
}
namep[l] = '\0';